I’m with Matt. The fact that the USA dominates more than half of the world map here probably says more about USA prejudices than anything else. There’s a lot more variety and diversity in Europe than the USA, as well as more than twice as many people. And China and India are far bigger still, yet barely make it onto the map!

I think that is the point of the joke, it’s not serious, whoever made it is probably american and taking the piss as well as exploiting the stereotypes they know most about. Within the UK alone there are hundreds of stereotypes.

In hindsight, looking at it with less early morning grumpy eyes, it would seem that the relative size of the nations is poking fun at the possible stereotypical notion that they are bigger than every other nation combined. The fact that Canada is so tiny is an obvious reference to this. That is, if it was meant in that way (ie the US poking fun at the USA).

this map reflects American stereotypes about stereotyping. the ideas that everyone in Europe thinks that everyone else is “arrogant” and that everyone in the Middle East thinks that everyone else in the Middle East is “bad” are themselves American sterotypes.